Meet the Team
Together, we are Quintessential: an alliance of Clinicians, Strategists, Legal Advocates and Community leaders dedicated to whole system transformation through faith, healing, equity and global compassion.
Dr Angela Misra
Chair of Trustees & Chief Medical Visionary Officer
A visionary leader in integrative psychiatry and global recovery innovation, Dr Angela Misra has redefined addiction and mental health care with compassion, rigour and cultural depth. A Fellow of the Royal College of Psychiatrists and architect of the Revolutionary Recovery™ model, she brings unparalleled clinical excellence to our mission of whole-person healing and human dignity.
Beyond her clinical achievements, Dr Misra is a passionate community advocate who has given herself wholly to helping others heal. Her work spans some of the most challenging and sensitive arenas, including pioneering deradicalisation programmes for vulnerable women. With courage and clarity, she has helped women disentangle from extremism, reclaim their identity, and begin new lives grounded in dignity, purpose and resilience.
Her faith-informed approach blends evidence-based therapy with deep spiritual intelligence, creating recovery pathways that resonate with the mind, body and soul. Angela has led grassroots programmes across the UK and globally, uplifting underserved communities and transforming fragmented systems into spaces of belonging and hope.
Her leadership reflects a profound commitment to social healing, gender justice, and the creation of compassionate systems that see the whole person and stand by them through every step of their transformation.
Usman Raja
Chief Humanity and Social Restoration Officer
Usman Raja is a uniquely gifted reformer and healer whose life's work has been dedicated to restoring humanity in its fullest sense. Over two decades, he has helped countless individuals reclaim their dignity, purpose, and identity through his deep commitment to transformational justice and spiritual rehabilitation.
Known for his extraordinary empathy and unwavering presence, Usman has led groundbreaking work on government-led deradicalisation programmes, where he successfully guided some of the most complex and damaged minds back toward peace, purpose and community. His methods grounded in compassion, faith, and accountability have become a beacon for community restoration globally.
At Quintessential, Usman leads our humanity and transformation portfolio with unmatched dedication. He creates safe, restorative pathways that empower individuals to overcome trauma, addiction, extremism, and alienation. His leadership ensures our mission is never abstract; it is lived, personal, and profoundly human.
We are privileged to walk alongside him in this journey of social and spiritual healing.
Craig O'Donnell
Chair of Global Collaboration & Partnerships
Craig O'Donnell is a senior healthcare strategist and systems partnership leader, recognised for two decades of success in shaping cross-border healthcare initiatives and collaborative reform. His experience spans international development, public health policy, and private hospital strategy, with a focus on scalable models that improve outcomes and access.
Craig has worked with government bodies both in the UK and overseas, advising ministries of health, non-governmental organisations, and multilateral stakeholders on complex, multi-agency programmes. His diplomatic acumen and strategic clarity have been instrumental in launching healthcare reforms, public-private partnerships, and integrated care systems in culturally diverse and politically sensitive environments.
In addition to his global consultancy, Craig has long championed the power of community based systems and interfaith collaboration to achieve health equity. He supports inter-organisational coalitions that empower local change agents and centre the voices of the marginalised in designing sustainable care models.
At Quintessential, Craig leads our global collaboration and systems partnerships portfolio. He will be instrumental in securing and sustaining international alliances connecting our mission with the world’s changemakers, philanthropists, and institutional leaders. His ability to move between vision and execution ensures that our global mission is both grounded and far-reaching.
Siama O'Donnell
Executive Vice Chair & Chief Strategy Architect
A force in international hospital consultancy, Siama O'Donnell brings over 25 years of experience leading health system reform, hospital activation and global workforce transformation. Her strategic and operational acumen guides Quintessential’s infrastructure and impact growth across continents.
Siama's work bridges high-level policy with ground-level impact. Having led major health initiatives in post-conflict regions and underserved populations, she is deeply driven by a vision of accessible excellence in care. She mentors emerging leaders from underrepresented communities and builds systems that place dignity at the centre of service.
As a global connector, Siama has brought together public institutions, philanthropists, and healthcare leaders to co-create impactful and scalable programmes. She is a trusted advisor to ministries of health and a leader in building high-performing clinical teams that deliver across both public and private systems.
Her extensive background in talent strategy and operational scaling makes her instrumental in launching Quintessential's global mission. Siama leads our outreach to visionary investors, strategic allies and thought leaders across continents, ensuring our work is resourced, amplified and enduring. With deep relationships across sectors and an unwavering commitment to human wellbeing, she brings power and purpose into alignment for global good.
Vajahat Sharif
Trustee, General Counsel & Chair of Legal Integrity
Vajahat Sharif is a distinguished legal strategist whose work spans litigation, national security, human rights, regulatory and compliance matters. With deep experience in NGOs, community and mission driven organisations, he has played a key role in shaping legislation and policy to protect vulnerable communities and promote social justice.
At Quintessential, Vajahat leads our legal and governance strategy, ensuring that every aspect of our operation is underpinned by accountability, transparency and integrity. He advises on cross-border legal frameworks, international partnerships, and the legal architecture of our community interventions. His values-driven counsel is essential in helping us navigate global jurisdictions while staying true to our mission of ethical transformation.
Vajahat is also a tireless advocate for accessible justice, and he brings a powerful voice to issues of equality, protection, and restorative legal practice.
Sajad Afzal
Trustee & Chief Community Insight Advisor
Sajad Afzal is a respected grassroots leader whose work has focused on empowering underserved communities and amplifying marginalised voices. With years of experience delivering local engagement programmes, facilitating dialogue across generational and cultural divides, and supporting individuals through recovery, reintegration, and education, he is a trusted bridge between lived experience and strategic action.
Sajad’s insight helps ensure that Quintessential’s initiatives remain people-centred and practically grounded. He advises on community consultation, access equity, and culturally sensitive delivery, drawing on his background in outreach, youth leadership and neighbourhood transformation.
Through his commitment to authenticity and accountability, Sajad keeps the organisation anchored in the real challenges and aspirations of the communities we serve.